Low-dimensional compounds containing cyanido groups. XXIV. Crystal structure, spectroscopic and thermal properties of two Cu(II) tetracyanidoplatinate complexes with tetradentate N-donor ligands

作者：Vavra Martin^*; Potocnak Ivan; Dusek Michal

来源：Inorganica Chimica Acta, 2014, 409: 441-448.

DOI：10.1016/j.ica.2013.09.016

• Crystal structure
• Tetradentate N-donor ligand
• Tetracyanidoplatinate(II)
• Infrared spectroscopy
• Thermal study

Violet crystals of [Cu-2(teta)(2)Pt(CN)(4)](2)[Pt(CN)(4)](2) (1, teta = N,N'-bis(2-aminoethyl)-1,2-diaminoethane; triethylenetetramine) and {[Cu-3(bapen)(3)Pt(CN)(4)][Pt(CN)(4)](2)center dot 13H(2)O}(n) (2, bapen = N,N'-bis(3-aminopropyl)-1,2- diaminoethane) were crystallized from the water-methanol or aqueous solutions containing Cu(II) salt, teta or bapen ligand and K-2[Pt(CN)(4)]. Both compounds were characterized using elemental analysis, IR and UV-Vis spectroscopy, thermal and X-ray crystal structure analysis. Two v(C N) absorption bands in the IR spectra of the complexes imply non-equivalency of cyanido groups meaning the presence of both, terminal and bridging ones and together with the results of elemental analysis indicate simple chain-like structure. Thermal decompositions of the prepared complexes are few-step processes which comprise liberation of crystal water (only for 2), decay of N-donor ligands L and release of cyanido groups. Finally, an X-ray crystal structure analysis has shown their complicated crystal structures. On one hand, complex 1 is of ionic character and is formed from a couple of trinuclear [Cu(teta)-Pt(CN)(4)-Cu(teta)](2+) complex cations and a couple of discrete [Pt(CN)(4)](2) anions. On the other hand, complex 2 is of polymeric character and is formed by 1D chains of {[Cu-3(bapen)(3)Pt(CN)(4)](4+)}(n) composition, 2n single [Pt(CN)(4)](2) anions and 13n molecules of crystal water.

• 出版日期2014-1-1